Majimoji Rurumo

High-school student Shibaki is known as the school’s greatest pervert, leaving the girls he likes eager to avoid him. When he finds a library book about summoning witches, he tries its instructions as a joke—and summons Rurumo, an apprentice witch who grants his foolish wish at a steep price. Rather than take Shibaki’s soul, Rurumo accepts his help, but the choice costs her position and puts her life at risk. To become a witch again, she must get Shibaki to use 666 magic wishing tickets. Each ticket, however, shortens his life, leaving him to choose between helping Rurumo and resisting the temptation to make wishes.